#include "reportissuedialog.h"
#include "ui_reportissuedialog.h"

#include <QJsonArray>
#include <QJsonDocument>
#include <QJsonObject>
#include <QMessageBox>
#include <QNetworkRequest>
#include <QRegularExpression>

namespace {
    const QString GITEA_BASE_URL = "https://code.redline.llc";
    const QString REPO_OWNER = "njohnson";
    const QString REPO_NAME = "XPlor";
}

ReportIssueDialog::ReportIssueDialog(QWidget *parent)
    : QDialog(parent)
    , ui(new Ui::ReportIssueDialog)
    , mNetworkManager(new QNetworkAccessManager(this))
{
    ui->setupUi(this);

#ifdef GITEA_ACCESS_TOKEN
    mAccessToken = GITEA_ACCESS_TOKEN;
#endif

    connect(ui->buttonSend, &QPushButton::clicked, this, &ReportIssueDialog::onSendClicked);
    connect(ui->buttonCancel, &QPushButton::clicked, this, &ReportIssueDialog::onCancelClicked);
    connect(mNetworkManager, &QNetworkAccessManager::finished, this, &ReportIssueDialog::onNetworkReplyFinished);
}

ReportIssueDialog::~ReportIssueDialog()
{
    delete ui;
}

bool ReportIssueDialog::isValidEmail(const QString &email)
{
    static QRegularExpression emailRegex(
        R"(^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$)"
    );
    return emailRegex.match(email).hasMatch();
}

bool ReportIssueDialog::validateFields()
{
    QString summary = ui->lineEditSummary->text().trimmed();
    QString details = ui->textEditDetails->toPlainText().trimmed();
    QString email = ui->lineEditEmail->text().trimmed();

    if (summary.isEmpty()) {
        QMessageBox::warning(this, tr("Required Field"), tr("Please enter a summary for the issue."));
        ui->lineEditSummary->setFocus();
        return false;
    }

    if (details.isEmpty()) {
        QMessageBox::warning(this, tr("Required Field"), tr("Please describe the issue in detail."));
        ui->textEditDetails->setFocus();
        return false;
    }

    if (email.isEmpty()) {
        QMessageBox::warning(this, tr("Required Field"), tr("Please enter your email address."));
        ui->lineEditEmail->setFocus();
        return false;
    }

    if (!isValidEmail(email)) {
        QMessageBox::warning(this, tr("Invalid Email"), tr("Please enter a valid email address."));
        ui->lineEditEmail->setFocus();
        return false;
    }

    return true;
}

void ReportIssueDialog::onSendClicked()
{
    if (!validateFields()) {
        return;
    }

    QString title = ui->lineEditSummary->text().trimmed();
    QString details = ui->textEditDetails->toPlainText().trimmed();
    QString email = ui->lineEditEmail->text().trimmed();

    QString body = details + QString("\n\n---\nContact: %1").arg(email);

    ui->buttonSend->setEnabled(false);
    ui->buttonSend->setText(tr("Sending..."));

    sendIssueReport(title, body, email);
}

void ReportIssueDialog::onCancelClicked()
{
    reject();
}

void ReportIssueDialog::sendIssueReport(const QString &title, const QString &body, const QString &/*email*/)
{
    QUrl url(QString("%1/api/v1/repos/%2/%3/issues")
             .arg(GITEA_BASE_URL, REPO_OWNER, REPO_NAME));

    QNetworkRequest request(url);
    request.setHeader(QNetworkRequest::ContentTypeHeader, "application/json");

    if (!mAccessToken.isEmpty()) {
        request.setRawHeader("Authorization", "token " + mAccessToken.toUtf8());
    }

    QJsonObject json;
    json["title"] = title;
    json["body"] = body;
    json["labels"] = QJsonArray{12};

    mNetworkManager->post(request, QJsonDocument(json).toJson());
}

void ReportIssueDialog::onNetworkReplyFinished(QNetworkReply *reply)
{
    ui->buttonSend->setEnabled(true);
    ui->buttonSend->setText(tr("Send Report"));

    QByteArray responseData = reply->readAll();
    QString responseStr = QString::fromUtf8(responseData);

    if (reply->error() != QNetworkReply::NoError) {
        QString errorStr = reply->errorString();
        if (errorStr.isEmpty()) {
            errorStr = "Unknown network error";
        }
        QMessageBox::critical(this, tr("Error"),
            tr("Failed to send issue report:\n%1").arg(errorStr));
    } else {
        int status = reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
        if (status == 201) {
            QMessageBox::information(this, tr("Success"),
                tr("Issue reported successfully. Thank you for your feedback!"));
            accept();
        } else {
            QMessageBox::warning(this, tr("Failed"),
                tr("Unexpected response from server (status %1).").arg(status));
        }
    }

    reply->deleteLater();
}